INTERVIEW QUESTIONS MULTIMEDIA TELECOMMUNICATIONS DETAILS

Question: A 2MB PCM(pulse code modulation) has…
a) 32 channels
b) 30 voice channels & 1 signaling channel.
c) 31 voice channels & 1 signaling channel.
d) 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel.

Answer: Ans c

Ans c Source: CoolInterview.com

Answer is D.
A 2Mb PCM line has 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel(time slot 0).
Source: CoolInterview.com

ITS 30 VOICE CHANNELS, 1 SIGNALING CHANNEL AND I SYNC CHANNEL.

Source: CoolInterview.com

It depends on what kind of signaling is used, for CAS its 30 Voice+1 S/g+1Sync for SS7 it can be 31 Voice + 1Sync Source: CoolInterview.com

(d) for pcm systems 30 channels for communtion , 1 for sync & 1 for signalling Source: CoolInterview.com

A 2Mb PCM(Pulse code Modulation) line has 32 channels out of which 30 voice channels, 1 signaling channel, & 1 synchronization channel. Source: CoolInterview.com

2 MB means 64kbps*32 channel=2048Mbps 2 channel use for signaling basicaly 0 & 31 channel using . Source: CoolInterview.com

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